/**
 * 加法
 * @param arg1
 * @param arg2
 * @returns
 */
function accAdd(arg1, arg2) {
	var r1, r2, m;
	try { r1 = arg1.toString().split(".")[1].length } catch (e) { r1 = 0 };
	try { r2 = arg2.toString().split(".")[1].length } catch (e) { r2 = 0 };
	m = Math.pow(10, Math.max(r1, r2));
	return (arg1 * m + arg2 * m) / m;
}

/**
 * 减法
 * @param arg1
 * @param arg2
 * @returns
 */
function accSubtr(arg1, arg2) {
	var r1, r2, m, n;
	try { r1 = arg1.toString().split(".")[1].length; } catch (e) { r1 = 0; }
	try { r2 = arg2.toString().split(".")[1].length; } catch (e) { r2 = 0; }
	m = Math.pow(10, Math.max(r1, r2));
	//动态控制精度长度
	n = (r1 >= r2) ? r1 : r2;
	return ((arg1 * m - arg2 * m) / m).toFixed(n);
}

/***
 * 乘法，获取精确乘法的结果值
 * @param arg1
 * @param arg2
 * @returns
 */
function accMul(arg1, arg2) {
	var m = 0, s1 = arg1.toString(), s2 = arg2.toString();
	try { m += s1.split(".")[1].length } catch (e) { };
	try { m += s2.split(".")[1].length } catch (e) { };
	return Number(s1.replace(".", "")) * Number(s2.replace(".", "")) / Math.pow(10, m);
}

/***
 * 除法，获取精确乘法的结果值
 * @param arg1
 * @param arg2
 * @returns
 */
function accDivCoupon(arg1, arg2) {
	var t1 = 0, t2 = 0, r1, r2;
	try { t1 = arg1.toString().split(".")[1].length; } catch (e) { }
	try { t2 = arg2.toString().split(".")[1].length; } catch (e) { }
	with (Math) {
		r1 = Number(arg1.toString().replace(".", ""));
		r2 = Number(arg2.toString().replace(".", ""));
		return (r1 / r2) * pow(10, t2 - t1);
	}
}